The time course of visuo-spatial working memory updating revealed by a retro-cuing paradigm.

摘要: We investigated the influence of non-cued working memory representations on further information processing. A retro-cue indicated if items left or right side a previous array remained relevant. Subsequently, central probe item was presented with varying stimulus onset asynchrony (SOA: 300, 400, 600, 1000, 1800 ms). Participants had to state whether this shown cued array. The either cued, new item. Non-cued probes were associated delayed response times and an increased frontal negativity from 400–600 ms indicating higher processing conflict compared probes. These effects strongest for 300 400 ms SOAs decreased in longer SOA conditions, pointing toward benefit when there sufficient time updating. Furthermore, contralateral negativities at posterior (PCN) anterior sites (ADAN) reflected attentional orienting while selective retention sustained suppression induced alpha power direction. Results suggest that updating visuo-spatial requires about 500 ms transfer contents into passive fragile short-term less impact ongoing